/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:57,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:57,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:57,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:57,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:57,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:57,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:57,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:57,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:57,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:57,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:57,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:57,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:57,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:57,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:57,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:57,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:57,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:57,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:57,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:57,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:57,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:57,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:57,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:57,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:57,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:57,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:57,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:57,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:57,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:57,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:57,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:57,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:57,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:57,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:57,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:57,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:42:57,180 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:57,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:57,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:57,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:57,182 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:57,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:57,182 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:57,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:57,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:57,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:57,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:57,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:57,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:57,183 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:57,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:57,184 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:57,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:57,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:57,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:57,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:57,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:57,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:57,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:57,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:57,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:57,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:57,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:57,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:57,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:57,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:57,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:57,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:57,501 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:57,501 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:57,502 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-06 18:42:57,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7797d9685/605b32eca9a44d9bbd4e5c6b1649a362/FLAGc295b96fd [2019-11-06 18:42:58,064 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:58,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-11-06 18:42:58,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7797d9685/605b32eca9a44d9bbd4e5c6b1649a362/FLAGc295b96fd [2019-11-06 18:42:58,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7797d9685/605b32eca9a44d9bbd4e5c6b1649a362 [2019-11-06 18:42:58,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:58,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:58,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:58,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:58,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:58,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5dd952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58, skipping insertion in model container [2019-11-06 18:42:58,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:58,436 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:58,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:58,624 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:58,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:58,668 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:58,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58 WrapperNode [2019-11-06 18:42:58,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:58,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:58,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:58,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:58,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... [2019-11-06 18:42:58,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:58,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:58,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:58,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:58,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:42:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:59,098 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:59,098 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:42:59,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:59 BoogieIcfgContainer [2019-11-06 18:42:59,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:59,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:59,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:59,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:59,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:58" (1/3) ... [2019-11-06 18:42:59,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18942e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:59, skipping insertion in model container [2019-11-06 18:42:59,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:58" (2/3) ... [2019-11-06 18:42:59,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18942e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:59, skipping insertion in model container [2019-11-06 18:42:59,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:59" (3/3) ... [2019-11-06 18:42:59,130 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2019-11-06 18:42:59,154 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:59,171 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:59,191 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:59,211 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:59,212 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:59,212 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:59,212 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:59,212 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:59,212 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:59,212 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:59,213 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 18:42:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:59,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:59,234 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:59,235 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-11-06 18:42:59,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:59,247 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345243678] [2019-11-06 18:42:59,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:59,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345243678] [2019-11-06 18:42:59,408 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:59,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:59,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476525746] [2019-11-06 18:42:59,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:59,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:59,432 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 18:42:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:59,557 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-11-06 18:42:59,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:59,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:42:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:59,566 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:42:59,566 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:42:59,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:42:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:42:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:42:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:42:59,608 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-11-06 18:42:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:59,609 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:42:59,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:42:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:59,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:59,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:59,611 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-11-06 18:42:59,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:59,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444479556] [2019-11-06 18:42:59,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:59,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444479556] [2019-11-06 18:42:59,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:59,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:59,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494407212] [2019-11-06 18:42:59,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:59,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:59,705 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-11-06 18:42:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:59,811 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:42:59,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:59,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:42:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:59,813 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:42:59,814 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:42:59,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:42:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-06 18:42:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:42:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 18:42:59,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-11-06 18:42:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:59,823 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 18:42:59,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 18:42:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:42:59,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:59,825 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:59,825 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-11-06 18:42:59,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:59,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903630301] [2019-11-06 18:42:59,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:42:59,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903630301] [2019-11-06 18:42:59,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034792192] [2019-11-06 18:42:59,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:00,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:43:00,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:43:00,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:00,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:43:00,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582118898] [2019-11-06 18:43:00,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:43:00,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:43:00,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:00,047 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2019-11-06 18:43:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:00,178 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-06 18:43:00,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:43:00,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-06 18:43:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:00,180 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:43:00,181 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:43:00,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:43:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-06 18:43:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:43:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-06 18:43:00,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-11-06 18:43:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:00,197 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-06 18:43:00,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:43:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-06 18:43:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:43:00,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:00,201 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:00,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:00,413 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-11-06 18:43:00,413 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:00,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136681711] [2019-11-06 18:43:00,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:43:00,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136681711] [2019-11-06 18:43:00,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382932811] [2019-11-06 18:43:00,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:00,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:00,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:00,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:43:00,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:43:00,617 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:00,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:43:00,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650098864] [2019-11-06 18:43:00,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:43:00,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:00,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:43:00,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:00,621 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-11-06 18:43:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:00,745 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-06 18:43:00,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:43:00,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-06 18:43:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:00,747 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:43:00,747 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:43:00,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:43:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-06 18:43:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:43:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-06 18:43:00,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-11-06 18:43:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:00,764 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-06 18:43:00,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:43:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-06 18:43:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:43:00,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:00,766 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:00,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:00,967 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-11-06 18:43:00,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:00,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460099227] [2019-11-06 18:43:00,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:43:01,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460099227] [2019-11-06 18:43:01,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815796280] [2019-11-06 18:43:01,093 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:01,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:43:01,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:01,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:43:01,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:43:01,185 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:01,185 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:43:01,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282718835] [2019-11-06 18:43:01,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:43:01,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:43:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:01,187 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2019-11-06 18:43:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:01,314 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-11-06 18:43:01,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:43:01,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-06 18:43:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:01,315 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:43:01,315 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:43:01,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:43:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-06 18:43:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:43:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-06 18:43:01,323 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-11-06 18:43:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:01,323 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-06 18:43:01,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:43:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-06 18:43:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:43:01,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:01,325 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:01,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:01,530 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:01,530 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-11-06 18:43:01,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:01,531 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019407896] [2019-11-06 18:43:01,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:43:01,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019407896] [2019-11-06 18:43:01,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481350606] [2019-11-06 18:43:01,617 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:01,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:01,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:01,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:43:01,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:43:01,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:01,697 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:43:01,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772687812] [2019-11-06 18:43:01,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:43:01,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:43:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:01,700 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2019-11-06 18:43:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:01,830 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:43:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:43:01,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-06 18:43:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:01,832 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:43:01,832 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:43:01,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:43:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 18:43:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:43:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-06 18:43:01,850 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-11-06 18:43:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:01,851 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-06 18:43:01,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:43:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-06 18:43:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:43:01,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:01,854 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:02,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:02,059 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-11-06 18:43:02,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:02,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90123901] [2019-11-06 18:43:02,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:43:02,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90123901] [2019-11-06 18:43:02,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65611671] [2019-11-06 18:43:02,177 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:02,465 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:43:02,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:02,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:43:02,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:43:02,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:02,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:43:02,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837685968] [2019-11-06 18:43:02,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:43:02,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:02,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:43:02,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:02,519 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2019-11-06 18:43:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:02,649 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-11-06 18:43:02,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:43:02,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-11-06 18:43:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:02,650 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:43:02,650 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:43:02,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:43:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-06 18:43:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:43:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:43:02,658 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-11-06 18:43:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:02,659 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:43:02,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:43:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:43:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:43:02,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:02,660 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:02,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:02,865 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-11-06 18:43:02,866 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:02,867 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540341272] [2019-11-06 18:43:02,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:43:02,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540341272] [2019-11-06 18:43:02,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789013570] [2019-11-06 18:43:02,970 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:03,170 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:43:03,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:03,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:43:03,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 18:43:03,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:03,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:43:03,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992930740] [2019-11-06 18:43:03,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:43:03,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:43:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:03,198 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 11 states. [2019-11-06 18:43:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:03,332 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-06 18:43:03,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:43:03,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-11-06 18:43:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:03,333 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:43:03,334 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:43:03,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:43:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:43:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:43:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-06 18:43:03,346 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-11-06 18:43:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:03,350 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-06 18:43:03,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:43:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-06 18:43:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:43:03,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:03,353 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:03,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:03,554 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-11-06 18:43:03,555 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:03,555 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283440709] [2019-11-06 18:43:03,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:43:03,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283440709] [2019-11-06 18:43:03,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226605102] [2019-11-06 18:43:03,705 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:03,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:43:03,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:43:03,792 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:03,793 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:43:03,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725453085] [2019-11-06 18:43:03,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:43:03,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:43:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:03,794 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2019-11-06 18:43:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:03,947 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-11-06 18:43:03,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:43:03,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-11-06 18:43:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:03,949 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:43:03,949 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:43:03,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:43:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-06 18:43:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:43:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-06 18:43:03,961 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-11-06 18:43:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:03,961 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-06 18:43:03,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:43:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-06 18:43:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:43:03,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:03,963 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:04,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:04,166 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-11-06 18:43:04,167 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:04,168 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247131505] [2019-11-06 18:43:04,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:43:04,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247131505] [2019-11-06 18:43:04,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420431731] [2019-11-06 18:43:04,320 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:04,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:04,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:04,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:43:04,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:43:04,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:04,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:43:04,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35991751] [2019-11-06 18:43:04,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:43:04,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:43:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:04,419 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2019-11-06 18:43:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:04,554 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-11-06 18:43:04,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:43:04,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-11-06 18:43:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:04,556 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:43:04,556 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:43:04,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:43:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 18:43:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:43:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-06 18:43:04,565 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-11-06 18:43:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:04,565 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-06 18:43:04,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:43:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-06 18:43:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:43:04,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:04,567 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:04,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:04,773 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-11-06 18:43:04,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:04,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787854683] [2019-11-06 18:43:04,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:43:04,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787854683] [2019-11-06 18:43:04,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491852821] [2019-11-06 18:43:04,948 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:05,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:43:05,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:05,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:43:05,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:43:05,185 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:05,185 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:43:05,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001038417] [2019-11-06 18:43:05,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:43:05,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:43:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:43:05,187 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 14 states. [2019-11-06 18:43:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:05,387 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-11-06 18:43:05,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:43:05,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2019-11-06 18:43:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:05,388 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:43:05,388 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:43:05,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:43:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:43:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-06 18:43:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:43:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-06 18:43:05,405 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-11-06 18:43:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:05,405 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-06 18:43:05,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:43:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-06 18:43:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:43:05,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:05,407 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:05,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:05,611 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-11-06 18:43:05,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:05,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041583364] [2019-11-06 18:43:05,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-06 18:43:05,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041583364] [2019-11-06 18:43:05,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098644283] [2019-11-06 18:43:05,770 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:05,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:05,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:05,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:43:05,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-06 18:43:05,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:05,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:43:05,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851118975] [2019-11-06 18:43:05,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:43:05,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:43:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:05,859 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 15 states. [2019-11-06 18:43:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:06,055 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:43:06,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:43:06,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-06 18:43:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:06,057 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:43:06,057 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:43:06,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:43:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:43:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:43:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-11-06 18:43:06,073 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-11-06 18:43:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:06,074 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-11-06 18:43:06,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:43:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-11-06 18:43:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 18:43:06,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:06,075 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:06,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:06,287 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-11-06 18:43:06,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:06,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375128985] [2019-11-06 18:43:06,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-06 18:43:06,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375128985] [2019-11-06 18:43:06,425 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004867977] [2019-11-06 18:43:06,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:20,900 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:43:20,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:20,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:43:20,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:43:20,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:20,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:43:20,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819863545] [2019-11-06 18:43:20,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:43:20,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:20,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:43:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:20,946 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 16 states. [2019-11-06 18:43:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:21,137 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-11-06 18:43:21,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:43:21,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2019-11-06 18:43:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:21,139 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:43:21,139 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:43:21,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:43:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-11-06 18:43:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:43:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-11-06 18:43:21,146 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-11-06 18:43:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:21,146 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-11-06 18:43:21,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:43:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-11-06 18:43:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:43:21,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:21,148 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:21,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:21,349 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-11-06 18:43:21,350 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:21,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422480141] [2019-11-06 18:43:21,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-06 18:43:21,537 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422480141] [2019-11-06 18:43:21,537 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087297953] [2019-11-06 18:43:21,537 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:34,788 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:43:34,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:34,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:43:34,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-06 18:43:34,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:34,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:43:34,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420426534] [2019-11-06 18:43:34,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:43:34,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:43:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:34,854 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 17 states. [2019-11-06 18:43:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:35,008 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2019-11-06 18:43:35,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:43:35,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-11-06 18:43:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:35,009 INFO L225 Difference]: With dead ends: 152 [2019-11-06 18:43:35,009 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:43:35,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:43:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:43:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:43:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2019-11-06 18:43:35,016 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2019-11-06 18:43:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:35,017 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2019-11-06 18:43:35,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:43:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2019-11-06 18:43:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:43:35,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:35,019 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:35,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:35,220 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2019-11-06 18:43:35,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:35,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592062686] [2019-11-06 18:43:35,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-06 18:43:35,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592062686] [2019-11-06 18:43:35,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955788876] [2019-11-06 18:43:35,419 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:35,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:43:35,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-06 18:43:35,528 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:35,528 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:43:35,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345088272] [2019-11-06 18:43:35,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:43:35,529 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:43:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:35,530 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 18 states. [2019-11-06 18:43:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:35,746 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2019-11-06 18:43:35,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:43:35,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2019-11-06 18:43:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:35,748 INFO L225 Difference]: With dead ends: 161 [2019-11-06 18:43:35,748 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:43:35,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:43:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-06 18:43:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 18:43:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2019-11-06 18:43:35,756 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2019-11-06 18:43:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:35,756 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2019-11-06 18:43:35,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:43:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2019-11-06 18:43:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:43:35,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:35,758 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:35,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:35,962 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2019-11-06 18:43:35,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:35,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015957369] [2019-11-06 18:43:35,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:36,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015957369] [2019-11-06 18:43:36,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097217092] [2019-11-06 18:43:36,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:36,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:36,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:36,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:43:36,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:36,234 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:36,235 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:43:36,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377539753] [2019-11-06 18:43:36,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:43:36,236 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:43:36,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:36,242 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 19 states. [2019-11-06 18:43:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:36,497 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2019-11-06 18:43:36,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:43:36,498 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-06 18:43:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:36,502 INFO L225 Difference]: With dead ends: 170 [2019-11-06 18:43:36,502 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:43:36,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:43:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-11-06 18:43:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:43:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-11-06 18:43:36,509 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2019-11-06 18:43:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:36,509 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-11-06 18:43:36,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:43:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-11-06 18:43:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 18:43:36,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:36,511 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:36,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:36,716 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2019-11-06 18:43:36,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:36,717 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925699566] [2019-11-06 18:43:36,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-06 18:43:36,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925699566] [2019-11-06 18:43:36,925 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640939295] [2019-11-06 18:43:36,925 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:43:40,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:40,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:43:40,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-06 18:43:40,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:40,434 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:43:40,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010977159] [2019-11-06 18:43:40,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:43:40,435 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:43:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:40,436 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 20 states. [2019-11-06 18:43:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:40,636 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2019-11-06 18:43:40,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:43:40,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2019-11-06 18:43:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:40,638 INFO L225 Difference]: With dead ends: 179 [2019-11-06 18:43:40,638 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:43:40,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:43:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-06 18:43:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:43:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2019-11-06 18:43:40,645 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2019-11-06 18:43:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:40,645 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2019-11-06 18:43:40,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:43:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2019-11-06 18:43:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:43:40,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:40,646 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:40,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,853 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2019-11-06 18:43:40,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:40,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767407144] [2019-11-06 18:43:40,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-06 18:43:41,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767407144] [2019-11-06 18:43:41,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209895402] [2019-11-06 18:43:41,052 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,136 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:41,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:41,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:43:41,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:41,174 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:41,174 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:43:41,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203998429] [2019-11-06 18:43:41,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:43:41,175 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:41,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:43:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:41,176 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 21 states. [2019-11-06 18:43:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:41,359 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-06 18:43:41,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:43:41,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2019-11-06 18:43:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:41,361 INFO L225 Difference]: With dead ends: 188 [2019-11-06 18:43:41,361 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:43:41,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:43:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-11-06 18:43:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:43:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2019-11-06 18:43:41,368 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2019-11-06 18:43:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:41,368 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2019-11-06 18:43:41,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:43:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2019-11-06 18:43:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:43:41,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:41,369 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:41,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,573 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2019-11-06 18:43:41,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:41,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217021775] [2019-11-06 18:43:41,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-06 18:43:42,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217021775] [2019-11-06 18:43:42,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951321181] [2019-11-06 18:43:42,179 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true